We've got a small, young urban "orchard" of about 16 dwarf and semi-dwarf fruit trees. At least half are stone fruits, all trees are young - about 4 years old. While removing old mulch and adding compost, I found a large glob of jelly-like substance at the base of one of the most vigorous trees - one of two apricot trees. I cleaned away the area, and washed away the goo with the garden hose. Attached are a few pictures of the damage. From what I'm finding online, this sounds and looks like peach tree borer. The tree is still very vigorous, although 1/4 to 1/3 of the base of it is affected so far. I'd like to save this tree, and to protect the other trees in the yard. Are there any recommendations you can give me on how? And also, when I can expect the critical adult stage of this pest in my region?